Bio - Based / Green Solvents, High-Purity Solvents

Dihexyl Adipate (DHA)

Dihexyl Adipate (DHA), scientifically identified by its CAS registry number 110-33-8, is a high-performance diester formed through the esterification of adipic acid with hexanol. This clear, colorless, and virtually odorless liquid is categorized as a low-polarity organic solvent and a specialized plasticizer. Known for its remarkable chemical stability and low volatility, DHA exhibits a unique molecular structure consisting of a linear six-carbon dicarboxylic acid backbone linked to two hexyl chains. Its physical properties include a low freezing point and high boiling point, making it exceptionally effective in cold-temperature applications where flexibility must be maintained. DHA is highly compatible with a diverse range of synthetic resins, including polyvinyl chloride and various cellulose-based polymers. As a non-toxic alternative in specific formulations, it serves as an essential component in high-end industrial chemistry, facilitating the modification of viscosity and glass transition temperatures. Its hydrophobic nature ensures excellent resistance to water leaching and environmental degradation.

Attributes

Key Features and Benefits

Low-Temperature Performance: Provides exceptional flexibility and impact resistance to polymer matrices in extreme cold, preventing brittleness.
High Compatibility: Demonstrates superior miscibility with various vinyl resins and rubbers, ensuring long-term homogeneity and minimal migration.
Low Volatility: Exhibits a very low vapor pressure, which reduces chemical loss during processing and extends product lifespan.
Excellent Solvency: Functions as an efficient solvent for many organic compounds, aiding in the formulation of coatings and inks.
Thermal Stability: Maintains chemical integrity and color under high-temperature processing conditions, ensuring high-quality end-products for demanding industrial uses.

Specifications

Technical Highlights

Chemical Identity: Defined by the molecular formula C18H34O4 with a molar mass of approximately 314.46 grams per mole.
Density and Refractive Index: Typically shows a density of 0.925 g/cm³ at 20°C and a refractive index of 1.439.
Boiling and Flash Points: Features a boiling point of 341°C at atmospheric pressure and a flash point exceeding 180°C.
Solubility Profile: Insoluble in water but highly soluble in common organic solvents like ethanol, ether, and chloroform.
Purity Levels: Standard industrial grades maintain a purity of ≥99% with minimal acidity and moisture content for optimal performance.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

PVC Compounding: Utilized as a specialized plasticizer for flexible PVC sheets, films, and cables intended for outdoor or cryogenic environments.
Synthetic Lubricants: Acts as a base stock or additive in high-performance lubricants and hydraulic fluids for automotive and aerospace.
Cosmetics Industry: Employed as an emollient and skin-conditioning agent in personal care products, providing a smooth, non-greasy skin feel.
Coatings and Inks: Serves as a film-forming aid and coalescing agent in specialized paints, ensuring proper drying and durability.
Rubber Processing: Integrated into nitrile and neoprene rubber formulations to improve low-temperature elasticity and overall processing efficiency.